Physics
Scientific paper
Apr 2008
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2008jsrs.meet...46m&link_type=abstract
"Proceedings of the "Journées Systèmes de Référence Spatio-temporels 2007". Observatoire de Paris, 17-19 September 2007. Editor:
Physics
Scientific paper
The Hipparcos catalogue provides a reference frame in optical wavelength for the new ICRS. The differences in the system of proper motions of Hipparcos and the previous materialization of the reference frame, the FK5, are expected to be caused only by the combined effects of the motion of the equinox of the FK5 as well as the Luni-solar and planetary precession, but several authors have signaled the existence of an inconsistency for the proper motion differences of the FK5-Hipparcos with the ∆p values corresponding to the Luni-solar precession as determined from VLBI and LLR It is a fact that the widely employed parametric models do not remove the bias in the random variables. The introduction of a non parametric method, combined with the inner product in L2 over S 2 shows the necessity of removing the bias. The precessional formulas should be rearranged to be used in this case. When applying this model, the obtained values for the precession corrections are very consistent with the ones currently adopted by the IAU.
Lopez Jose Alberto
Marco Jose F.
Martinez Jean-Michel
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